全文获取类型
收费全文 | 868篇 |
免费 | 46篇 |
国内免费 | 7篇 |
专业分类
耳鼻咽喉 | 28篇 |
儿科学 | 11篇 |
妇产科学 | 24篇 |
基础医学 | 119篇 |
口腔科学 | 32篇 |
临床医学 | 68篇 |
内科学 | 290篇 |
皮肤病学 | 8篇 |
神经病学 | 47篇 |
特种医学 | 20篇 |
外科学 | 106篇 |
综合类 | 4篇 |
一般理论 | 1篇 |
预防医学 | 34篇 |
眼科学 | 8篇 |
药学 | 50篇 |
肿瘤学 | 71篇 |
出版年
2024年 | 1篇 |
2023年 | 7篇 |
2022年 | 32篇 |
2021年 | 64篇 |
2020年 | 25篇 |
2019年 | 28篇 |
2018年 | 36篇 |
2017年 | 38篇 |
2016年 | 21篇 |
2015年 | 39篇 |
2014年 | 43篇 |
2013年 | 42篇 |
2012年 | 81篇 |
2011年 | 81篇 |
2010年 | 37篇 |
2009年 | 38篇 |
2008年 | 62篇 |
2007年 | 66篇 |
2006年 | 51篇 |
2005年 | 47篇 |
2004年 | 40篇 |
2003年 | 18篇 |
2002年 | 11篇 |
2001年 | 2篇 |
2000年 | 1篇 |
1999年 | 1篇 |
1996年 | 1篇 |
1990年 | 1篇 |
1988年 | 1篇 |
1986年 | 1篇 |
1985年 | 1篇 |
1979年 | 3篇 |
1977年 | 1篇 |
排序方式: 共有921条查询结果,搜索用时 0 毫秒
911.
912.
913.
Krystyna Stec-Michalska Sebastian Malicki Blazej Michalski Lukasz Peczek Maria Wisniewska-Jarosinska Barbara Nawrot 《World journal of gastroenterology : WJG》2009,15(43):5409-5417
AIM: To investigate the level of gastric ghrelin in stomach mucosa of dyspeptic patients in relation to Helicobacter pylori ( H pylori) infection, bacterial cytotoxicity, topography and gender.METHODS: The study comprised 40 premenopausal women (19 H pylori positive) and 48 men (17 H pylori positive) with functional dyspepsia.All gastric biopsy specimens revealed normal mucosa or non-atrophic gastritis.Gastric ghrelin concentration was determined by Enzyme linked immunosorbent assay.The cagA and vacA strains of bacterial DNA were identified by multiplex polymerase chain reaction.RESULTS: In general, infection with H pylori caused an increase in gastric ghrelin level regardless of gender and stomach topography.Significantly more hormone was present in both, non-infected and H pylori positive female samples, as compared to males.The distribution of bacterial strains showed cagA(+) vacA s1m1 and cagA(-) vacA s2m2 genotypes as the most common infections in the studied population.A tendency to higher ghrelin levels was observed in less cytotoxic ( cagA negative) strain-containing specimens from the antrum and corpus of both gender groups (without statistical significance).CONCLUSION: An increase in gastric ghrelin levels at the stage of non-atrophic gastritis in H pylori positive patients, especially in those infected with cagA(-) strains, can exert a gastroprotective effect. 相似文献
914.
915.
916.
917.
Andrea Torroni Chongchen Xiang Lukasz Witek Eduardo D. Rodriguez Roberto L. Flores Nikhil Gupta Paulo G. Coelho 《Journal of cranio-maxillo-facial surgery》2018,46(3):473-478
WE43 Mg alloy, composed of Mg, Yttrium, Rare Earth elements, and Zirconium, has proved to be a suitable candidate for production of resorbable osteosynthesis implants in both clinical and experimental settings. In a previous study we tested biocompatibility and degradation properties of untreated (as-cast) and artificially aged (T-5) WE43 Mg-alloys as subperiosteal implants on a maxillofacial sheep model. Both the alloy compositions showed excellent biocompatibility, however, with respect to degradation rate, the as-cast form showed increased degradability compared with the T-5. In the present study, we tested the same alloy composition (i.e. as-cast and T-5) to assess their biological behavior and degradation pattern when implanted as endosteal implants on a calvarial bone sheep model. Six implants in form of cylindrical discs were tested in 6 sheep, one per composition of each disc was placed in two monocortical cranial defect created with high speed trephine bur in the parietal bone. After euthanasia at 6 weeks histomorphological analysis of the bone/implant specimens was performed. WE43-as cast showed higher degradation rate, increased bone remodeling, gas pockets formation and osteolysis compared with the T5 alloy. WE43-T5 showed greater bone/implant interface stability, and seemed to be more suitable for fabrication of endosteal bone screws. 相似文献
918.
919.
920.
Microvascular and proteomic signatures overlap in COVID-19 and bacterial sepsis: the MICROCODE study
Rovas Alexandros Buscher Konrad Osiaevi Irina Drost Carolin Christina Sackarnd Jan Tepasse Phil-Robin Fobker Manfred Kühn Joachim Braune Stephan Göbel Ulrich Thölking Gerold Gröschel Andreas Rossaint Jan Vink Hans Lukasz Alexander Pavenstädt Hermann Kümpers Philipp 《Angiogenesis》2022,25(4):503-515
Angiogenesis - Although coronavirus disease 2019 (COVID-19) and bacterial sepsis are distinct conditions, both are known to trigger endothelial dysfunction with corresponding microcirculatory... 相似文献